Finite element simulation of dislocation based plasticity and diffusion in multiphase materials at high temperature

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A single-crystal plasticity model as well as a gradient crystal plasticity model are used to describe the creep behavior of directionally solidi¿ed NiAl based eutectic alloys. To consider the transition from theoretical to bulk strength, a hardening model was introduced to describe the strength of the reinforcing phases. Moreover, to account for microstructural changes due to material ¿ux, a coupled diffusional-mechanical simulation model was introduced.